Dawei Wang

TL;DR: It is revealed that strain progressively drives the average spin angle from in-plane to out-of-plane, a property used to tune the exchange bias and giant-magnetoresistive response of spin valves.

TL;DR: Observations suggest that the present system can be considered as a potential lead-free material for the applications in electrostrictive area and that BT-based ferroelectric ceramics would have giant electroStrictive coefficient over other ferro electric systems.

TL;DR: In this paper, the adsorption of SF6 and SF6 decomposition gases (SO2 and H2 S) on phosphorene was investigated to diagnose the state of online gas insulated switchgear (GIS).

TL;DR: In this paper, the electrostrictive effect of PMN-xPT relaxor was investigated in Pb(Mg1/3Nb2/3)O3-xPbTiO3 (PMN) relaxor ferroelectric crystal, with respect to orientation, temperature, and composition.

Abstract: Perovskite oxides form a fascinating class of materials because they possess many active degrees of freedom that result in a large variety of physical effects. One important structural parameter controlling the behavior of perovskites is the tilting of the oxygen octahedral. Among other properties, this tilting is coupled with the electric and magnetic orders, which leads to novel and potentially useful phenomena; recent examples include new mechanisms for improper and triggered ferroelectricity, rich phase diagrams, and novel chiral phases, counter-intuitive behaviors of ferroelectric and multiferroic films, and weak ferromagnetism in otherwise antiferromagnetic materials. Interestingly, most perovskites present the same tilted structures, which are few in number and fairly simple. In contrast, here we use different theoretical methods to show that a complete new family of stable phases, all displaying complex and nano-twinned tilting patterns (as well as other anomalous properties), exists in multiferroic BiFeO3 and related compounds.